CN104078143B - A kind of anti-torsion cable - Google Patents

Abstract

The invention belongs to cable and technical field of electric power, especially relate to a kind of anti-torsion cable, it includes many covered wires, envelopes the restrictive coating of covered wire, and covered wire is made up of conductor, the insulating barrier that envelopes conductor, it is characterised in that connected by dowel between adjacent insulating barrier；Restrictive coating is that face contacts or doublet contact with every covered wire.The present invention has following main beneficial effect: torsional property is more excellent, it is less to produce equipment, production place is less, manufacturing cost is lower, product cost is lower.

Description

a torsion resistant cable

technical field

The invention belongs to the technical field of cables and electric power, and in particular relates to a torsion-resistant cable.

Background technique

In the prior art, a multi-core cable is usually formed by unidirectional helically twisting a plurality of insulated wires containing insulated core wires inside to form a strand, and then extruding a sheath layer outside the strand; the cable's The stranded body is in the shape of a cylinder, and each insulated wire in the stranded body is tangent to the sheath layer, and each insulated wire forms a single-wire contact with the sheath layer. When the cable is used overhead and when it is laid, it will be continuously twisted. Such a twist will cause relative rotation between the twisted body and the sheath layer when the sheath layer and the twisted body are loosely matched. In severe cases, it will affect the power supply. The performance of the cable may even cause deformation and breakage of the cable conductor.

Contents of the invention

In order to solve the above problems, the object of the present invention is to disclose a torsion-resistant cable, which is realized by adopting the following technical solutions.

A torsion-resistant cable, which includes four insulated wires and a sheath covering the insulated wires. The insulated wires are composed of conductors and insulating layers covering the conductors. connected by connecting ribs; the sheath layer is in double-sided contact with each insulated wire; there are two connecting bars between the sheath layer and each insulated wire; the inner surface of the sheath layer is not the side of the cylinder but It is four planes; the insulated wire is a rectangular parallelepiped with missing corners.

A twist-resistant cable, which includes a plurality of insulated wires and a sheath layer covering the insulated wires. The insulated wires are composed of conductors and insulating layers covering the conductors. The connecting ribs are connected; the sheath layer is in surface contact or double-wire contact with each insulated wire.

The aforementioned torsion-resistant cable is characterized in that there are one or two connecting bars between the sheath layer and each insulated wire.

The torsion-resistant cable described above is characterized in that when the sheath layer is in surface contact with each insulated wire, the contact surface is single or double.

The aforementioned torsion-resistant cable is characterized in that the inner wall of the sheath layer is not the side of the cylinder.

The torsion-resistant cable described above is characterized in that the insulated wire is in the shape of a cuboid or a cuboid or cylinder with missing corners.

The aforementioned torsion-resistant cable is characterized in that the inner surface of the sheath layer has multiple planes.

The aforementioned torsion-resistant cable is characterized in that the material of the conductor is copper or aluminum or an alloy.

The aforementioned torsion-resistant cable is characterized in that the material of the insulating layer is polyethylene or polypropylene or polyvinyl chloride or low-smoke halogen-free polyolefin.

The torsion-resistant cable described above is characterized in that the material of the connecting rib is polyethylene or polypropylene or polyvinyl chloride or low-smoke halogen-free polyolefin.

The aforementioned torsion-resistant cable is characterized in that the material of the connecting strip is polyethylene or polypropylene or polyvinyl chloride or low-smoke halogen-free polyolefin.

The aforementioned torsion-resistant cable is characterized in that the material of the sheath layer is polyethylene or polypropylene or polyvinyl chloride or low-smoke halogen-free polyolefin.

In the present invention, the connecting ribs connect the insulating layer as a whole; when there is a connecting body, the connecting body connects the insulating layer and the sheath layer as a whole; the torsion resistance performance of the cable is greatly increased.

In the present invention, the connecting ribs connect the insulating layers as a whole; when there is no connecting body, since the contact surfaces between the sheath layer and each insulating layer are two planes, the rotation of the insulating layer and the sheath layer is limited, thus greatly increasing the The torsional performance of the cable.

In the present invention, the connecting ribs connect the insulating layers as a whole; when there is no connecting body, since the contact between the sheath layer and each insulating layer is a double-wire contact, the rotation of the insulating layer and the sheath layer is also limited, thus greatly increasing the torsional performance of the cable.

Of course, in the present invention, a filling substance can also be provided in the gap between the insulating layers, or between the insulating layer and the sheath layer, so as to further enhance the torsional performance of the cable.

In the three preferred implementation examples of the present invention, the torsion contrast test has been carried out with the cables in the prior art. Under the same test conditions, the cables of the present invention have not yet appeared If the cable core is loose, the conductor has no deformation and the current carrying capacity has not changed. However, after the cable in the prior art has been subjected to 200 times of continuous tests at ±360 degrees, twisted strands appear, the conductor is severely deformed, and the carrying capacity drops by 50%.

Insulator stranding equipment is not needed in the production of the present invention, so the input of stranding process and stranding equipment, labor, electricity, turnover plate, turnover area, etc. required for stranding are saved; The cable can be produced in the sheathing production process.

Therefore, the present invention has the following main beneficial effects: better torsion resistance, less production equipment, less production space, lower manufacturing cost, and lower product cost.

Description of drawings

Fig. 1 is a schematic diagram of a dissected three-dimensional structure of a section of Embodiment 1 of the present invention.

Fig. 2 is an enlarged front view of Fig. 1 .

Fig. 3 is a schematic diagram of a dissected three-dimensional structure of a section of Embodiment 2 of the present invention.

Fig. 4 is an enlarged front view of Fig. 3 .

Fig. 5 is a schematic diagram of a dissected three-dimensional structure of a section of Embodiment 3 of the present invention.

Fig. 6 is an enlarged front view of Fig. 5 .

detailed description

Implementation Example 1

Please see Figure 1 and Figure 2; a twist-resistant cable, which includes four insulated wires, a sheath 5 covering the insulated wires, the insulated wires are composed of a conductor 1, and an insulating layer 2 covering the conductors. It is characterized in that the adjacent insulation layers are connected by connecting ribs 3; the sheath layer and each insulated wire are in double-sided contact; there are two connecting strips 4 between the sheath layer and each insulated wire; The inner surface of the sheath layer is not the side of the cylinder but four planes; the insulated wire is a rectangular parallelepiped with missing corners.

Implementation Example 2

Please see Fig. 3 and Fig. 4, a twist-resistant cable, which includes four insulated wires and a sheath layer 5 covering the insulated wires. The insulated wires are composed of a conductor 1 and an insulating layer 2 covering the conductors. It is characterized in that the adjacent insulation layers are connected by connecting ribs 3; the sheath layer is in double-sided contact with each insulated wire; the inner surface of the sheath layer is not the side of the cylinder and is four planes; the insulation The line is a rectangular parallelepiped with notched corners.

Implementation Example 3

Please see Figure 5 and Figure 6, a twist-resistant cable, which includes three insulated wires and a sheath layer 5 covering the insulated wires. The insulated wires are composed of a conductor 1 and an insulating layer 2 covering the conductors. Its characteristics The adjacent insulation layers are connected by connecting ribs 3; the sheath layer is in double-wire contact with each insulated wire; the inner wall or inner surface of the sheath layer is not the side of the cylinder but has three Plane; insulated wire is cylindrical.

Of course, a torsion-resistant cable in the present invention may include other multiple insulated wires; the sheath layer is in surface contact or double-wire contact with each insulated wire.

Of course, a twist-resistant cable in the present invention is characterized in that there may be one or two or more connecting bars between the sheath layer and each insulated wire.

Of course, the torsion-resistant cable in the present invention is characterized in that when the sheath layer is in surface contact with each insulated wire, the contact surface is single-sided or double-sided.

Of course, the torsion-resistant cable in the present invention is characterized in that the inner wall of the sheath layer is not the side of the cylinder.

Certainly, a torsion-resistant cable in the present invention is characterized in that the insulated wire is in the shape of a cuboid or a cuboid with missing corners or a cylinder or other suitable shapes.

Certainly, a torsion-resistant cable in the present invention is characterized in that the inner surface of the sheath layer has multiple planes.

Certainly, a twist-resistant cable in the present invention is characterized in that the material of the conductor is copper or aluminum or an alloy or other suitable conductive materials.

Certainly, a twist-resistant cable in the present invention is characterized in that the material of the insulating layer is polyethylene or polypropylene or polyvinyl chloride or low-smoke halogen-free polyolefin or other suitable plastics.

Certainly, a twist-resistant cable in the present invention is characterized in that the material of the connecting rib is polyethylene or polypropylene or polyvinyl chloride or low-smoke halogen-free polyolefin or other suitable plastics.

Certainly, a twist-resistant cable in the present invention is characterized in that the material of the connecting strip is polyethylene or polypropylene or polyvinyl chloride or low-smoke halogen-free polyolefin or other suitable plastics.

Certainly, a twist-resistant cable in the present invention is characterized in that the material of the sheath layer is polyethylene or polypropylene or polyvinyl chloride or low-smoke halogen-free polyolefin or other suitable plastics.

In the present invention, the connecting ribs connect the insulating layer as a whole; when there is a connecting body, the connecting body connects the insulating layer and the sheath layer as a whole; the torsion resistance performance of the cable is greatly increased.

In the present invention, the connecting ribs connect the insulating layers as a whole; when there is no connecting body, since the contact surfaces between the sheath layer and each insulating layer are two planes, the rotation of the insulating layer and the sheath layer is limited, thus greatly increasing the The torsional performance of the cable.

In the present invention, the connecting ribs connect the insulating layers as a whole; when there is no connecting body, since the contact between the sheath layer and each insulating layer is a double-wire contact, the rotation of the insulating layer and the sheath layer is also limited, thus greatly increasing the torsional performance of the cable.

Of course, in the present invention, a filling substance can also be provided in the gap between the insulating layers, or between the insulating layer and the sheath layer, so as to further enhance the torsional performance of the cable.

In the three preferred implementation examples of the present invention, the torsion contrast test has been carried out with the cables in the prior art. Under the same test conditions, the cables of the present invention have not yet appeared If the cable core is loose, the conductor has no deformation and the current carrying capacity has not changed. However, after the cable in the prior art has been subjected to 200 times of continuous tests at ±360 degrees, twisted strands appear, the conductor is severely deformed, and the carrying capacity drops by 50%.

Insulator stranding equipment is not needed in the production of the present invention, so the input of stranding process and stranding equipment, labor, electricity, turnover plate, turnover area, etc. required for stranding are saved; The cable can be produced in the sheathing production process.

Therefore, the present invention has the following main beneficial effects: better torsion resistance, less production equipment, less production space, lower manufacturing cost, and lower product cost.

The present invention is not limited to the best implementation mode above, it should be understood that the concept of the present invention can be implemented in other forms, and they also fall within the protection scope of the present invention.

Claims (6)

1. an anti-torsion cable, it includes four covered wires, envelopes the restrictive coating of covered wire, and covered wire is made up of conductor, the insulating barrier that envelopes conductor, it is characterised in that connected by dowel between adjacent insulating barrier；Restrictive coating and every covered wire are double contacts；There are between restrictive coating and every covered wire two connection straps；The inner surface of described restrictive coating is not cylindrical side but four planes；Covered wire is the cuboid of unfilled corner.

A kind of anti-torsion cable the most according to claim 1, it is characterised in that the material of described conductor is copper or aluminum or alloy.

3. according to a kind of anti-torsion cable described in claim 1 or claim 2, it is characterised in that the material of described insulating barrier is polyethylene or polypropylene or polrvinyl chloride or low-smoke halogen-free polyolefin.

4. according to a kind of anti-torsion cable described in claim 1 or claim 2, it is characterised in that the material of described connection strap is polyethylene or polypropylene or polrvinyl chloride or low-smoke halogen-free polyolefin.

5. according to a kind of anti-torsion cable described in claim 1 or claim 2, it is characterised in that the material of described dowel is polyethylene or polypropylene or polrvinyl chloride or low-smoke halogen-free polyolefin.

6. according to a kind of anti-torsion cable described in claim 1 or claim 2, it is characterised in that the material of described restrictive coating is polyethylene or polypropylene or polrvinyl chloride or low-smoke halogen-free polyolefin.